Molding-press.



J. A. BURLEIGH.

MOLDING PRESS. APPLICATION FILED JUNE 8, 1911.

1,030,252, v Patented June 18,1912.

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MOLDING PRESS.

APPLICATION FILED JUNEB, 1911.

1,030,252. Patented June 18, 1912.

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J. A. BURLEIGH.

MOLDING PRESS.

APPLICATION FILED JUNE 8, 1911. 1,030,252, Patented June 18, 1912.

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JOHN A. BURLEIGI-I, 0F OLEAN, NEW YORK.

MOLDING-PRESS.

Specification of Letters Patent.

Patented June 18, 1912.

Application filed June 8, 1911. Serial m. 632,060.

To all whom it may concern:

Be it known that I, JOHN A. BURLEIGH, a citizen of the United States, residing at Olean, in the county of Cattaraugus and State of New York, have invented certain new and useful Improvements in Molding- Presses, of which the following is a specification.

This invention relates to glass molding machines, and is intended to be an improvement on or modification of the machine shown and claimed in my application No. 575139, filed Aug. 10, 1910.

The present invention relates especially to the means fo-rvoperating or withdrawing an internal neck ring or former from the neck or mouth of the bottle or other vessel to be produced.

In the application above referred to a neck ring or sleeve is providedwhich is attached to a frame which is movable up and down by .means of connections to a piston, a plunger being also provided, which works within the neck ring, and is connected to another piston.

The present inventionretains the double piston feature, so that the plunger and neck ring are independently operated, but introduces a novel construction with respect particularly to the neck ring, the result of which is to hold the neck ring in position until the plunger is withdrawn from the mold, after which the plunger and neck ring lift together. Also an outer neck ring or former is clamped in position upon the mold, until the plunger and inner neck ring are completely withdrawn therefrom. This has been found to have the advantage of preventing any irregularity or scoring of the interior of the bottle neck, which sometimes happened with the former machine, possibly in consequence of some slight vibration of the parts during the withdrawal of the neck ring. V

In the accompanying drawingsFigure 1 is a vertical sectional view showing the position of the parts with the plunger and neck ring advanced. Fig. 2 is a similar view with said parts lifted or retracted. Fig. 3 is a similar view with the parts fully lifted from the mold.

Referring specifically to the drawings, 6 indicates the table of the machine and 7 the top plate thereof. These will be supported in any suitable manner, and no description of the'supports is believed to be necessary,

as the construction thereof is unimportant.

The table 6 supports the body 8 of the mold in which the blank is pressed. An outer neck former or ring 10 fits on top of the mold. This is made in two parts and will be locked in position by known devices and is old int-he art.

Above the mold is a circular plate 12 to the underside of which is bolted a plate 13 having a downwardly projecting sleeve or cufl' 18 which is adapted to press against v the top of the neck former 10, when the plate 12 is lowered, and which holds said former tightly in position upon the top of the mold. This sleeve also serves as a guide for the top ring 15 which has a depending sleeve or inner neck former 17 adapted to enter within the outer neck ring 10, to form the inside ofthe neck of the bottle. This ring 15 and sleeve 17 are made in one piece so as to avoid fins on the inside of the bottle neck, which is a highly desirable feature. The plunger 16 works up and down through the top ring 15. Said plunger is screwed into the lower end of an adjusting screw 18 having external threads which take into internal threads at the lower end of a tube 19 which is flanged at the top, as indicated at 20 and bolted to a plate 21 which is fastened to the piston rod 29 of the lower piston 31 which works in the cylinder 32, in the manner described in my former application. The screw 18 is adjust-able in the tube 19, to vary the position of the plunger, and may be fixed at adjustment by a nut 22.

The top ring 15 is screwed into the lower end of a sleeve 23 which surrounds the screw 18 and tube 19, and may be made in two sections screwed together as shown at 24:, the upper section having an outstanding flange 25 at the top. This sleeve works through an opening in the top of a box or casing 26, bolted to the upper side of the plate 12, and a spring 27 is confined between a flange 26 at the top of the box and a shoulder 29f on the sleeve, the spring being coiled around the sleeve. A cylindrical box 33 is screwed onto the flange 20, and has at the lower end an inwardly projecting flange 34 adapted to strike the flange 25 and lift the sleeve 23,

and thereby the top ring 15, when the plate 21 is lifted to a suflicient extent for that purpose, as shown in Fig. 2.

An upper plate 35 is connected to the lower ends of rods 36 which are attached to a cross head 37 mounted on the rod 38 of the upper piston 39, which travels in the upper cylinder 40, in a manner also similar to that described in my former application. The movement of the pistons in the respective cylinders may be cont-rolled by any suitable supply and valve arrangement. As illustrated in the former application, there may be a pair of four way valves 41 which are connected together for simultaneous operation by a chain belt 42 which extends around sprocket wheels 43 on the stems of the valves. An inlet pipe 44 for air under pressure leads to each valve, with suitable exhaust pipes 45 and 46, leading to an outlet, from the top and bottom of the corresponding cylinders, the arrangement being such that when the valves are turned one way air will be admitted above the pistons and exhausted from below the same, and vice versa.

The plate 35 is connected by rods 50 to the plate 12, with springs 51 coiled around the rods, between said lower plate 12 and the plate 21. The flange 26 constitutes a guide for the movement of the sleeve 23, and it will be seen that said sleeve 23 and the inner neck former attached thereto are movable to a certain extent, independent of the lower plate 12, whereas in the old construction the inner former was attached to the lower plate.

is a nozzle for blowing cooling air against the plunger 16 when it 'is lifted from the mold.

In the operation of the machine, assuming that the mold has been charged, air is admitted into the top of the cylinders, driving the pistons down. by means of the connecting rods, forces down the plate 12 and presses the part 13 against the top of the outer neck former 10, and so holds the same against movement.

At the same time the top ring 15 and inner sleeve 17 are forced down together with the plunger 16, the former operating in connection with the sleeve 23 which is pressed down by the casing 26 and spring 27 as the plate 12 descends, and the plunger being forced down by the tube 19 as the lower piston descends; and as the lower piston continues to descend the plunger 16 is forced down into the mold, to press the charge.

- The valves are then reversed, and the first inner forming sleeve 17, as also shown in Fig. 2, said parts being thus entirely withaction is to lift the plunger 16, and after it lifts from the glass, as shown in Fig. 2, the

flange 34 picks up the flange 25 and thereby lifts the sleeve 23 andthe top ring 15 and drawn from the mold. Then,the upper pisand the outer clamping sleeve 13 The upper piston,

ton begins to lift and carries with it the plate 12 and the sleeve 13*, thereby releasing the pressure on the outer neck former 10, which permits said former and the mold to be removed and opened, for removal of the blank, the parts resuming their original position for the next operation.

It will be seen that the initial lift of the inner neck former is accomplished by the movement of the lower piston, the downward movement, however, being produced by the movement of the upper piston, the support-ing sleeve 23 for the inner neck former being capable of a certain amount of movement with respect to both the plunger It is found that the withdrawal of the inner neck former 17, with the plunger, the outer neck former remaining clamped on the mold, gives a better result, and insures a smooth and regular surface on the inside of the bottle neck.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a press for molding bottles or the like, the combination of an outer neck ring,

% adapted to fit upon the top ofa mold body, an inner neck former movable into and out of the outer ring, a plunger movable.

through the inner former, a movable clamping device adapted to clamp the outer ring against the mold body when advanced and to release the same when retracted, a spring pressure connection between the clamping device and the inner former, whereby the inner former is advanced when the clamping device is advanced, and a connection between the plunger and the inner former operative to retract the latter against the tension of said spring when the plunger is retracted.

2. In a molding press, the combination of a reciprocating mold-clamping. member, a piston connected thereto, to advance and retract the same, an inner former movable to andfrom the mold, and having a spring connection to said piston to advance said former to the mold, a plunger movable in i and out through said former, another piston connected to the plunger to advance and retract the plunger, and a pick-up device connected to the last mentioned piston, to pick up and retract the inner former, independently of said clamping member, and against the tension of said spring.

3. In a molding press, the combination of a reciprocating mold-clamping member,-an

inner former movable to and from the mold, a plunger and its operating devices, the plunger working through the said former, connections between the clamping member and the inner former operative when the clamping member is advanced, to also advance the said former, and yieldable when the said former is retracted, and connections between the plunger operating devices and the inner former, engaged when the plunger is retracted, to also retract the former, and disengaged when the plunger is advanced.

4. In a molding press, the combination of a mold-clamping member, a piston connected thereto, a plunger and a piston connected thereto, an inner former surrounding the plunger, a tube connected to said former, said tube having a projecting flange, a pickup member connected to the plunger piston and adapted to engage said flange and lift the said tube and former when the plunger is raised, and a connection between the clamping member and said tube, adapted to advance the tube and former, said connection being yieldable, to permit the said lift of the tube when the plunger is retracted.

5. In a molding press, the combination of a piston, a lower plate 12 connected thereto,

a clamping sleeve 18 attached to the plate, another piston, an upper plate 21 attached thereto, springs between the upper and lower plates, a plunger connected to the upper plate and movable within said sleeve, a tubular neck former through which the plunger works and movable within said sleeve, a yielding connection between the plate 12 and the tubular neck former, adapted to advance the neck former and to permit retraction thereof, and lifting devices between the upper plate and the neck former, said devices being engaged when the upper plate is lifted and disengaged when it is lowered.

In testimony whereof, I affix my signature in presence of two witnesses.

JOHN A. BURLEIGH.

Witnesses:

F. E. CoLLINs, I. L. CLYDE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

